Determination of program protection factors for half-mask respirators used at a mineral sands separation plant

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      <subfield code="a">Determination of program protection factors for half-mask respirators used at a mineral sands separation plant</subfield>
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      <subfield code="a">The principal objective of this study was to determine the minimum protection factor that could be applied to the annual average ambient airborne radioactivity concentration for a separation plant worker following periods of intermittent respiratory protective equipment (RPE) usage. The study was designed to measure the program protection factor of the half-mask filter cartridge respirators used in the plant</subfield>
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      <subfield code="a">American Industrial Hygiene Association journal</subfield>
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      <subfield code="g">Vol. 53, nº 11, November 1992 ; p. 713-720</subfield>
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